I have advocated from the beginning, that like it or not, the hiring agent's (or client as the case may be) critical thinking skills are what should be used.
That's seems a rather inferior system for a number of reasons.
First off, say I have 100 applicants, as an employer, how exactly am I going to weed out the potentially unqualified candidates with the potentially qualified candidates? How is one such applicant going to demonstrate their education? Remember, even when people test out with CLEP, they still earn the same degree as the university graduates.
Second off, if there's no independent certification, then I can see employers having to run burdensome tests on pretty much every potential candidate, among other needless probationary methods to weed out the viable ones.
'm going to WANT any help that narrows down the candidacies, which is why after all, employers generally favor things such as certification, and degrees.
Third off, if I'm a client who for example, has no knowledge of plumbing, how am I supposed to dis concern the good plumbers from the bad plumbers? Just a roll of dice hoping they know what the hell they're doing? What's to stop some quack from claiming to be a medical doctor to medically illiterate individuals and charging for scams like "nerve tonic"? (Yes, I know things like this still happen here and there, but if we rely on the general public's ability to dis concern the quacks from the real deal, well, that kind of thing would greatly increase I'd argue)